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linux32_wait.c revision 1.6 
      1 /*	$NetBSD: linux32_wait.c,v 1.6 2007/12/20 23:02:59 dsl Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Emmanuel Dreyfus
     17  * 4. The name of the author may not be used to endorse or promote
     18  *    products derived from this software without specific prior written
     19  *    permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
     22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     23  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
     25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 
     36 __KERNEL_RCSID(0, "$NetBSD: linux32_wait.c,v 1.6 2007/12/20 23:02:59 dsl Exp $");
     37 
     38 #include <sys/types.h>
     39 #include <sys/param.h>
     40 #include <sys/fstypes.h>
     41 #include <sys/signal.h>
     42 #include <sys/dirent.h>
     43 #include <sys/kernel.h>
     44 #include <sys/fcntl.h>
     45 #include <sys/select.h>
     46 #include <sys/proc.h>
     47 #include <sys/ucred.h>
     48 #include <sys/swap.h>
     49 #include <sys/wait.h>
     50 
     51 #include <machine/types.h>
     52 
     53 #include <sys/syscallargs.h>
     54 
     55 #include <compat/netbsd32/netbsd32.h>
     56 #include <compat/netbsd32/netbsd32_conv.h>
     57 #include <compat/netbsd32/netbsd32_syscallargs.h>
     58 
     59 #include <compat/linux/common/linux_types.h>
     60 #include <compat/linux/common/linux_signal.h>
     61 #include <compat/linux/common/linux_machdep.h>
     62 #include <compat/linux/common/linux_misc.h>
     63 #include <compat/linux/common/linux_oldolduname.h>
     64 #include <compat/linux/linux_syscallargs.h>
     65 
     66 #include <compat/linux32/common/linux32_types.h>
     67 #include <compat/linux32/common/linux32_signal.h>
     68 #include <compat/linux32/common/linux32_machdep.h>
     69 #include <compat/linux32/common/linux32_sysctl.h>
     70 #include <compat/linux32/common/linux32_socketcall.h>
     71 #include <compat/linux32/linux32_syscallargs.h>
     72 
     73 int
     74 linux32_sys_waitpid(struct lwp *l, const struct linux32_sys_waitpid_args *uap, register_t *retval)
     75 {
     76 	/* {
     77 		syscallarg(int) pid;
     78 		syscallarg(netbsd32_intp) status;
     79 		syscallarg(int) options;
     80 	} */
     81 	struct linux32_sys_wait4_args ua;
     82 
     83 	SCARG(&ua, pid) = SCARG(uap, pid);
     84 	SCARG(&ua, status) = SCARG(uap, status);
     85 	SCARG(&ua, options) = SCARG(uap, options);
     86 	NETBSD32PTR32(SCARG(&ua, rusage), NULL);
     87 
     88 	return linux32_sys_wait4(l, &ua, retval);
     89 }
     90 
     91 int
     92 linux32_sys_wait4(struct lwp *l, const struct linux32_sys_wait4_args *uap, register_t *retval)
     93 {
     94 	/* {
     95 		syscallarg(int) pid;
     96 		syscallarg(netbsd32_intp) status;
     97 		syscallarg(int) options;
     98 		syscallarg(netbsd32_rusagep_t) rusage;
     99 	} */
    100 	int error, status, linux_options, options, was_zombie;
    101 	struct rusage ru;
    102 	struct netbsd32_rusage ru32;
    103 	int pid;
    104 
    105 	linux_options = SCARG(uap, options);
    106 	options = WOPTSCHECKED;
    107 	if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS))
    108 		return EINVAL;
    109 
    110 	if (linux_options & LINUX_WAIT4_WNOHANG)
    111 		options |= WNOHANG;
    112 	if (linux_options & LINUX_WAIT4_WUNTRACED)
    113 		options |= WUNTRACED;
    114 	if (linux_options & LINUX_WAIT4_WALL)
    115 		options |= WALLSIG;
    116 	if (linux_options & LINUX_WAIT4_WCLONE)
    117 		options |= WALTSIG;
    118 
    119 	pid = SCARG(uap, pid);
    120 	error = do_sys_wait(l, &pid, &status, options,
    121 	    SCARG_P32(uap, rusage) != NULL ? &ru : NULL, &was_zombie);
    122 	retval[0] = pid;
    123 	if (pid == 0)
    124 		return error;
    125 
    126 	/* XXXAD ksiginfo leak */
    127 	sigdelset(&l->l_proc->p_sigpend.sp_set, SIGCHLD);
    128 
    129 	if (SCARG_P32(uap, rusage) != NULL) {
    130 		netbsd32_from_rusage(&ru, &ru32);
    131 		error = copyout(&ru32, SCARG_P32(uap, rusage), sizeof(ru32));
    132 	}
    133 
    134 	if (error == 0 && SCARG_P32(uap, status) != NULL) {
    135 		status = bsd_to_linux_wstat(status);
    136 		error = copyout(&status, SCARG_P32(uap, status), sizeof(status));
    137 	}
    138 
    139 	return error;
    140 }
    141